Wondering for guys who have modified their ECU programming without changing wastegates what boost you are seeing. Some guy on another site claims to have gotten his data from 6speed saying that no X50 cars can get over .9 bars unless they change wastegates.

 

calling Dr. Tom (Kerr)??

 

My car is a non x50 car and I get 1.0 bar with no problem at all. Did the GIAC Flash and I didn't upgrade the dv's yet.

Kevin

 

My GT2 consistently got .9, and would occasionally see 1.0 & 1.1 with a REVO SPS3 program that is supposed to yield 1.2.

Then I upgraded the wastegates and now I get 1.1 - 1.2 consistently. I've even seen 1.3 once or twice.

Aside from the max boost increase, I also get more boost much earlier than I ever did before which makes WAY MORE torque.

If you're considering changing the wastegates... just do it!

 

Yes I know about the wastegates. I have them ready to install. This is about a fellow P-car owner who has indicated that an X50 car can not get over .9 bar with just a flash. I beg to differ. That is all.

 

I have an X50 and haven't changed the wastegates. I regularly see 1.1 bar after the GIAC flash.

Mark

 

I am going to ask a dumb question...so forgive me. Are wastegates and diverter valves the same thing????

Kevin

 

The GIAC flash calls to tighten the stock wastegates on X50 cars. No matter who you get your flash from, the factory wastegate springs are weak and can not keep the exhaust pressure from forcing open the wastegates. This will result in low and uneven boost control.

Keep in mind that .9 BAR means .9 BAR power. Your friend is not getting any sizeable power increase from his flash.

IMO the wastegate mod (or EVO replacement wastegates) are mandatory on cars running over 1 BAR boost.

I felt a tremendous increase in midrange torque after the wastegate mod performed at the Speed Gallery. The car has much more midrange punch and stronger top end. I wasn't happy with my flash until Speed Gallery came to the rescue.

 

my stock '03X50 would easily get .9 then I did flash and would see 1.1 easily, then i did wastegate and now frequently see 1.3 spikes, holds 1.2 all day long!

 

Same here. Feels much better after the wastegate mod.

 

there is a difference between hitting a boost level and sustaining it... spikes should not count... ur true boost level is 4th gear pull sustained...

 

I am stock and get .9

 

Yeah... what he said.

 

My turbo S was stock and I got a 0.9 as well.

 

Thanks wross, I'm the one who collected the initial data and no one wants to boost over 1bar more than I!

It sounds like there could be a simple explanation here... if GIAC calls for a tightening of the wastegate, that would explain why I can't get over 1 bar (CONSISTENTLY, not spikes. I can spike to 1.2 periodically, but I can't hold it).

So, it looks like most X50 owners see .9 bar stock, and then 1.1 after a flash and most likely a stock wastegate tightening.

One thing everyone seems to be in agreement on, though. Replacing the stock wastegate springs will allow higher boost alongside programming. I had a 1.4bar program installed, and couldn't get over .9 bar. I have 60k miles on my X50 car, so if anyone has weak springs it would be me!